package com.lqk.netty.groupchat.server;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.*;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.codec.string.StringDecoder;
import io.netty.handler.codec.string.StringEncoder;

public class GroupChatServer {

    private int port;   // 监听端口

    // 构造器


    public GroupChatServer(int port) {
        this.port = port;
    }

    // 编写 run 方法，处理客户端的请求
    public void run() throws InterruptedException {

        // 创建两个线程组
        EventLoopGroup bossGroup = new NioEventLoopGroup(1);
        EventLoopGroup workerGroup = new NioEventLoopGroup();   // 24个NioEventLoop

        try{
            ServerBootstrap serverBootstrap = new ServerBootstrap();
            serverBootstrap.group(bossGroup,workerGroup)
                    .channel(NioServerSocketChannel.class)
                    .option(ChannelOption.SO_BACKLOG,128)
                    .childOption(ChannelOption.SO_KEEPALIVE,true)
                    .childHandler(new ChannelInitializer<SocketChannel>() {
                        @Override
                        protected void initChannel(SocketChannel ch) throws Exception {
                            // 获取到 pipeline
                            ChannelPipeline pipeline = ch.pipeline();
                            // 向 pipeline 中加入一个解码器
                            pipeline.addLast("decoder",new StringDecoder());
                            // 向 pipeline 中加入一个编码器
                            pipeline.addLast("encoder",new StringEncoder());
                            // 加入自己的业务处理Handler
                            pipeline.addLast(new GroupChatServerHandler());
                        }
                    });

            System.out.println("netty 服务器启动！");
            ChannelFuture channelFuture = serverBootstrap.bind(port).sync();
            // 监听关闭事件
            channelFuture.channel().closeFuture().sync();

        }finally {
            bossGroup.shutdownGracefully();
            workerGroup.shutdownGracefully();
        }

    }

    public static void main(String[] args) {
        GroupChatServer groupChatServer = new GroupChatServer(7000);
        try {
            groupChatServer.run();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }

}
